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E. 0. OLSEN. COMPRESSOR FOR REFRIGERATI NG APPARATUS.

APPLICATION FILED DEC. 26. 19!?:

1,80%61 Patented June 17, 1919.

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Z7 WW 1-0 E. 0. OLSEN. COMPRESSOR FOR. REFRIGERATING APPARATUS.

APPLICATION F ILED DEC- 26.1917- Patent-ed June 17, 1919.

2 SHEETS-SHEET 2- the upper end of the cylinder.

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nnwntb. OLSEN, OF'MILWA'UKEE, Wisconsin, .essrenon. crown-rovers roFREDERICK M '1' GGRAFF, ONE-FOURTH TO TR MARGGMFF, GHE- FOURTH T0 VE'YMARGGRAJF, ALL OF MILWAUKEE, WISCONSIN.

oonrnnsson ron nnrni'ennarine Arranaros.

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Specification otLett'ers Patent. Patented Ji m e 1W 3919,

Application filed December 26, 1917. Serial Ito. 203,846.

To all whom it may concern:

Be-it known that I, EDWIN OLSEN, a

sists in the combination and arrangement of.

the parts as more fully hereinafter described. v

' The invention is further designed to provide a compressor in which theinlet valve is formed by the piston which opens and closes the inletport during its movement.

-The invention also has for itsobjectto introduce the refrigerant intothe compression cylinder upon the top of thepiston and to deliver itthrough a single va ve at The invention is further designed tO PI'O-vide a valve seat for the outlet valve which may be readily removed forthe purpose of renewal.

The invention further consists in the several features hereinafter setforth.

In the drawings:

Figure 1 is a vertical sectional view through the device embodying theinvention, the section being taken on the line 1-1 of Fig. 2;

Fig. 2 is a section taken on the line 22 of Fig. 1;

Fig. 3 is a section taken-on the line 33 of Fig. 2. v

The compressor comprises a crank case. 4 having a removable end plate 5secured thereto by bolts 6, the bottom being sealed by securing the base7 to a suitable support (not shown), a cylinder 9 integral with said.

crank case, a piston 10 within the cylinder, a crank shaft 11 journaledin bearings 12 mounted in the crank case, means for operativelyconnecting said piston to the crank shaft, and other parts moreparticularly hereinafter described.

The means for connecting the piston 12 to the shaft '11 consists of apitman 13 pivotally .crant gas which may wor crank case.

An annular rece1ver:or refrigerant chamconnected at one end the shaft 11and at its other end to a pin 14 secured within the piston by set screws15, the piston having a hollow interior portion 16. The worki'n face ortop of the'piston has a cylindrica recess 17 therein communicati opening18 leading into its, interior 16 said openmg having a valve seat 19 uponwhich with an rests a ball or check valve 20 whiohis limited in itsupward movement by an annular grid 21 secured within the recess 17. Thischeck valve opens when the piston is moving down so as to prevent theformation of a vacuum in the cylinder above the piston and also topermit the outward passage if relfrig- I into t e c ber 20 is formedintegral with the cylinder and surrounds a portion of the same. It isprovided with an inlet 23 and an outlet port 24 which is so positionedas to allow the refrigerant in the chamber to enter the cylinder whenthe piston has moved down to its piston whenit moves upwardly, thepiston thus performing the functions of an inlet valve.

The upper part 25 of the cylinder is provided with a water jacket 26,part of which is formed integral with the cylinder' and the other partis formed by a head 27 which is removably secured to the main portionofthe compressor by bolts 28'. The cooling water passes from a pipe 29into the jacket and out througha pi e 30.

Within the head 2 and formed integral therewith is the cylinder head.3'1 having an outlet conduit 32 leading therefrom, said head beingsurrounded by the water jacket 26.

lowerp'osition and which is closed by the The top of'the cylinder isprovided with a cylindrical recess 27 in which a valve seat 28 is,removably secured by clamping it between said cyllnder and the head 27.The connection between thehead 27 and the cylinder and outer jacketwalls 26 is made tight by providing annular recesses 33 and 3t in thecylinder and outer jacket wall, respectively, into which tit ackingrings 35 and 36 and annular ribs 3 and 38 on the head27.

Seated upon the seat 28 is an outlet valve 39, the stem. 40 of which isslidably mounted wit its

in a bore 41 in the cylinder head, the valve being held to its seat byspring 42 interposed between it and the head 31." To prevent therefrigerant working up into the space above the valve stem andincreasing the pressure upon the same a by-pass 43 is provided in thestem establishing communication between the cylinder head and theportion of the bore 41 above the valve stem. A purge cock 44 is mountedon the head in communication with the bore 41 to which a hose (notshown) may be attached to draw oil. the refrigerant when desired.

The compressor may be driven by a suitable source of power connected tothe crank shaft 11 and in the present instance I have shown a fly wheel45 on the shaft carrying a belt 46 which is adapted to be connected upto an electricmotor (not shown).

The working parts of the compressor are kept well oiled by introducingoil in the crank case through a suitable inlet and al-. lowing it topartially fill the same, the oil passing out through a suitable outletin said case in the usual manner.

With this construction the refrigerant gas in the chamber 20 passes andis sucked into the cylinder'9 above the piston 10 through the port 2 Lwhen the piston moves downwardly to uncover said port. During itsdownward travel the ball valve 20 is raised from its seat soas toestablish communication between the upper portion of the cylinder andthe crank case to prevent, the formation of a vacuum in that portion ofthe cylinder in front of the piston. During the upward stroke of thepiston the port 2 k and valve 20 are closed by the piston and therefmgerant is then compressed in the'cylinder between its head and thepiston. \Vhen the desired pressure has been reached, that is, when thegas has been liquefied, the resistance of the spring 42 is overcome andthe valve'39 opens-t0 permit-the passage of .the liquid refrigerant intothe cylinder head passes out through the chamber provided with an inletand an outlet communicating with the cylinder, a piston in said cylinderadapted to open and close said outlet, a head-section secured on thecylinder and formed with a cylinderhead provided with an outlet conduit,an outlet valve mounted in the head-section to control the flow of therefrigerant from the cylinder to the head outlet, said outlet valvebeing provided with a stem slida-bly mounted in a .bore formed in thehead-section, and said stem being provided with a by-pass to establishcommunication between the space above the outlet valve and the spaceabove the valve-stem, and a normally closed purgecock' connected to thevalve-stem bore to draw off the refrigerant when desired.

In testimony whereof, I aflix my signature.

EDWIN o. OLSEN.

